RE: cleaning out the diff grease on cen gst???
I have not put diff oil in my Nemesis yet. However, everybody I talked to that put it in said it makes quite a difference.
Oh and BTW, I wouldn't lock the center diff. You can buy some stupid thick diff oil (highest I've seen is 500,000wt). I'd put something like that in the diff instead so you don't completely loose it's function. But that's just my2cents.